Inflating device for pneumatic apparatus



w. n. LUT Z.

INFLATING DEVICE'FOR PNEUMATIC APPARATUS.

APPLICATION FILED OCT 19. 1915.

Patented Jan. 13, 1920.

III/VENTOR of K M A U R/VEY WILLIAM D. LUTZ,

0F ALLlilltl'lDAl'aIE, NEW JERSEY.

INFLATING DEVICE FOR PNEUMATIC APPARATUS.

Specification of Letters Patent.

Patented Jan. 13, 1920.

Application filed October 19, 1915. Serial No. 56,815.

To all whom it may concern:

Be it known that 1, WILLIAM D. LUTZ, a citizen of the United States, residing in Allendale, in the county of Bergen and State of New Jersey, have invented a new and useful Improvement in Inflating Devices for Pneumatic Apparatus, of which the followin is a specification.

My invention, which relates to an improvement in apparatus for inflating pneumatic tires, has for one of its objects the provision of means whereby a tire may be quickly and easily inflated. Another object of the invention is to provide an apparatus which is adapted to hold air and gas under compression and which may be easily transported from place to place. Vith an arrangement of this kind, in the case of a flat tire, instead'of having to inflate the tire by a pump as has to be done at the present time, and which is a very strenuous task, my apparatus may be connected up to the tire in a few minutes and the tire inflated without any labor, comparatively speaking, at all. These and other objects will be fully pointedout in the following description and the appended claims.

Referring to the drawing, Figure 1 shows my device in sectional elevation; Fig. 2 is an end view of the right hand end of the device; Fig. 3 is a section taken on the line adof Fig. l and lookingtoward the left; Fig. 4 is a section taken through the line ?)b of Fig. l, and looking toward the left.

Referring to the drawing in detail, my invention comprises a metal tube 1, preferably made of steel tubing, and forming what we shall call the explosion chamber, and having a spiral thread 2 cut on the outside thereof throughout practically its entire I length, the purpose of the spiral thread being to strengthen the tube and provide sufli- .cient radiating surface. Screwed into this expansion chamber at one end thereof, is a shell plug 3, packing 4 being provided between the explosion chamber and the plug to make an air tight fit. In the outer end of the shell plug 3 is an orifice 5, extending longitudinally of the plug for only part of its length, and adapted to receive another plug 6, which carries the firing pin 7. Extending from the bottom of the orifice 5 and longitudinally of the plug 3 to its inner end is a passage 8 which receives the shell 9 which is to contain the explosive used in the operation of the device. This through the plug to another orifice 13 which is at the inner end of the plug. Formed on the pin 7 near its inner end is a shoulder or collar 14, this shoulder, as is obvious, being for the purpose of preventing the escape of the pin 7 in a backward direction. Near the outer end of the pin is a spring 15 of slightly larger diameter than the passage 11. This spring, of course, prevents the escape of the pin in the other direction. The plug 6 when screwed into the plug 3 engages the shell 9 to hold the latter firmly in place while the apparatus is be ing used. Screwed into the other end of the tube or explosion chamber 1 is a tube 15, the inner end of said tube being provided with perforations 16 to permit the escape of gas from the explosion chamber. This tube 15 contains a mineral wool which filters the gases resulting from the combustion of the explosive. It may contain neutralizing chemicals which would absorb or neutralize deleterious gases resulting from the explosion. A valve plug 18 is screwed into the tube 15 at its outer end.

Extending across the inner face of the valve plug 18 is a groove 19. Extending longitudinally through the center of the plug 18 is a passage 20, this passage receiving the stem of a needle valve 21. Extending from the passage 20 near its inner end is another passage 22 leading down to the bottom of the plug 18 until it meets an orifice pro vided in the bottom of said plug for the reception of a flexible piping P which is to be attached to the valve of the tire to be inflated. A continuous passage is thus pro vided from the tube 15- to the valve of the tire. A corrugated and perforated strainer 17 is provided across the tube 15 near the inner end of the tube 18 when the latter is screwed into place. A gage 23 is connected to the plug 18 and has a passage leading down to the point at which the piping W is connected to the plug. Suitable packing 24 and 25 is provided between the tube 1 and tube 15, and between tube 15 and tube 18, to make the connections perfectly tight. A plug 26 is screwed into the outer end of the plug 18 and forms a stuffing box for the stem of the needle valve. R in Fig. 1 designates a relief valve to prevent too high pressure in the explosion chamber.

The operation of the device is as, follows: A loaded shell is inserted in the plug 3, the plug 6 is then screwed into place, the needle valve 21 closed, and the firing pin 7 struck a sharp blow. This fires the shell 9. Now the piping P is screwed into the valve plug 18, its other end attached to the valve of the tire, and the needle Valve 21 opened. Gas from the. explosion chamber will flow through the perforations 16, through the mineral wool W, strainer 17 passages 20, 22, into the piping P and through it to the tire. The gage 23 shows the amount of pressure in the tlre, and when this pressure has risen sufficiently the needle valve is closed again, and such gas as will be left in the expansion chamber may be stored up and used at a later time.

It will thus be seen that I have provided a device which is very easily operated, simple in its make-up and of great value for inflating pneumatic tires.

It is to be understood-that I do not limit myself to the exact details of structure herein disclosed, as I am aware that persons skilled in the art could make various changes therein without departing from the spirit and scope of my invention.

What I claim is 1. An apparatus for confining gas under pressure, comprising a cylinder, a plug aving a screw threaded connection with one end of the cylinder, said plug having a cylindrical bore extending therethrough to receive a cartridge, the plug being extended within said cylinder to incase the cartridge substantially throughout its length, and a second plug having a threaded connection 'with the first lug for closing it and retaining the cartri ge therein.

2. An apparatus for confining gas under pressure, comprising a cylinder, a plug having a screw threaded connection with one end of the cylinder, said plug having a cylindrical bore extendingtherethrough to receive a cartridge and a second plug having a threaded connection with the first plug for closing it and retaining the cartridge therein, and a firing pin extending through said second plug operable on a primer car ried by the cartridge for discharging the latter.

3. An apparatus for confining gas under pressure, comprising a cylinder, a plug having a screw threaded connectionwith one end of the cylinder, said plug having a cylindrical bore extending therethrough to receive a cartridge, a second plug having a threaded connection with the first plug for closing it and retaining the cartrid e therein, a'hollow plug having a threa ed connection with the opposite end of the cylinder, a valve plug closing the outer end of the hollow plug, a valve in said valve plug to regulate an outlet opening communicating with the interior of the hollow plug, and means in the latter for purifying the gas.

4. An apparatus for confining gas under pressure, comprising a cylinder, means at one end thereof for containing a cartridge, a hollow plug extending into the opposite end of the cylinder and having a threaded connection therewith, said plug having openings communicating with the interior of the cylinder, material in said plug for removing or neutralizing substances in the gas deleterious to the purpose to which the gas is to be put, and means for conducting the gas discharged from the cylinder through the hollow plug.

5. An apparatus for confining gas under pressure, comprising a cylinder, means at one end thereof for containing a cartridge, a hollow plug extending into the opposite end of the cylinder and having a threaded connection therewith, said plug having openings communicating with the interior of the cylinder, material in said plug for removing or neutralizing substances in the gas deleterious to the purpose to which the gas is to be put, a valve controlling the passage of gas through the hollow plu and means for closing the valve to retain t e gas in said cylinder and for opening the valve and regulating the rate of fiow of gas therethrough.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM D. LUTZ.

Witnesses:

PATRICIA F. MALDONADO, W. W. Goss. 

